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https://issues.apache.org/jira/browse/PDFBOX-2423?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14908987#comment-14908987
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Ben McCann edited comment on PDFBOX-2423 at 9/26/15 2:14 AM:
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It seems that to get Transparency_group_rewrite3.patch in we're going to have
to manually reapply it because it's really difficult to apply against the
latest trunk. I've submitted patches that split that up and make many of the
cleanup changes so that the remaining changes in
Transparency_group_rewrite3.patch are much smaller and will contain just the
meaty stuff.
See https://issues.apache.org/jira/browse/PDFBOX-2993 and
https://issues.apache.org/jira/browse/PDFBOX-2994
was (Author: chengas123):
It seems that to get Transparency_group_rewrite3.patch in we're going to have
to manually reapply it because it's really difficult to apply against the
latest trunk. I've submitted a patch for the first part of that which simply
introduces PDTransparencyGroup for better readability. See
https://issues.apache.org/jira/browse/PDFBOX-2993
> Page tree handling needs rewriting
> ----------------------------------
>
> Key: PDFBOX-2423
> URL: https://issues.apache.org/jira/browse/PDFBOX-2423
> Project: PDFBox
> Issue Type: Improvement
> Components: PDModel
> Affects Versions: 1.8.7, 2.0.0
> Reporter: John Hewson
> Assignee: John Hewson
> Priority: Blocker
> Fix For: 2.0.0
>
> Attachments: 025957.pdf, 26101_Colors.ai-1.png,
> 26101_Colors.ai-1.png-diff.png, Basiswissen-Vorschriften.pdf-3.png,
> Basiswissen-Vorschriften.pdf-3.png-diff.png,
> Basiswissen-Vorschriften.pdf-4.png,
> Basiswissen-Vorschriften.pdf-4.png-diff.png, PDFBOX-1058.pdf-1.png,
> PDFBOX-1058.pdf-1.png-diff.png, PDFBOX-1058.pdf-4.png,
> PDFBOX-1058.pdf-4.png-diff.png, PDFBOX-1094-tiling_pattern.pdf,
> PDFBOX-1711-cmyk.pdf-1.png, PDFBOX-1711-cmyk.pdf-1.png-diff.png,
> PDFBOX-1794-vattenfall.pdf-1.png, PDFBOX-1794-vattenfall.pdf-1.png-diff.png,
> PDFBOX-1917.pdf-1.png, PDFBOX-1917.pdf-1.png-diff.png,
> Transparency_group_rewrite3.patch, asy-functionshading.pdf-1.png,
> asy-functionshading.pdf-1.png-diff.png, bugzilla869140.pdf,
> example_026.pdf-1.png, gs-bugilla691763.pdf, gs-bugzilla688601.pdf,
> gs-bugzilla689518.pdf, gs-bugzilla690467.pdf, gs-bugzilla693322.pdf,
> gs-bugzilla694385.pdf, jagpdf_doc_patterns.pdf, samsung_galaxy_s_4_um-p1.pdf
>
>
> The way in which PDFBox handles the Page tree needs to be rewritten,
> preferably from scratch. Currently the document catalog returns the raw
> objects from the page tree, wrapped in either a PDPage or PDPageNode.
> We need to abstract over the page tree and get rid of PDPageNode, we should
> provide methods which can add/remove PDPage objects *only*. The existing
> low-level access to the page tree is not needed at the PD-level.
> Inheritance of page properties such as crop box, resources, and rotation
> should be reimplemented to use whatever new page tree abstraction we invent.
> We can finally remove the old broken methods which didn't look up the
> inheritance tree when retrieving these values.
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